Bo okkeeping machine



Jam 27, 193l- R. BAUMGARTEN ETAL 1,790,298

BOKKEEPING y MACHINE Filed April 5. 1929 2 Sheets-Sheet l I I'I'I'll Jam. 27, 1931. I R. BAUMGARTEN E1- AL. 1,790,298

' BooKKEPING MACHINE Filed April 5. 1929 2 Sheets-Sheet 2 Patented Jan. 27, 17931v IFJNITEDv ISTATES "PAT'EN'rf OFFICE RICHARD IBAUMGARTEN, 0F ERFURT, AND WILLY HESSELMANN, 0F BERLIN-, GER- IAIN'Y,` ABSIGNORS T0 THE FIRM AEG-DEUTSCHE WERKE AKTIENGESELLSCHAFT,

. 0F ERFURT, GERMANY BOOKKEEPING MACHINE Application filed April 5, 1929, Serial No. 352,876, and in Germany June20, 1928.

Our invention relates to typewriters and more especially to bookkeeping machines. In this t e of machines a sheet of paper known as t e audit sheet is permanently carried on the' platen and the matter which is being typed on forms such as statements of account, etc. is copied on the audit sheet.

It is an object of our invention to overcome certain diculties in connection with the insertion of the forms in such machines, particularly into the lower. paper guide, and with the alignin of the forms with respect to the" matter on t e audit sheet:

To this end we provide two sets of pressure rolls above the platen and we also provide mechanism for causing these sets to alternately engage the platen so that the audit sheet is held on the platen by one of the sets when it has been releasedby the other set,- and vice versa, and is never free.l

One of the sets is constituted by the usual l rollson the paper guide rod which are adapt` ed to be displaced on the rod for holding audit sheets of various widths. The other set is constituted by a plurality of resiliently supported-rolls in a rail which is Afulcrumed in the side walls of the paper carriage.

When it is desired to insert a form and the paper feedrolls below the platen have been lifted, the audit sheet is firmly held on the platen by the rolls of the first set, (the v rolls on-the paper guide bar) so that the auditsheet cannot move. on the platen notwithstandingits being released by the feed rolls. After the first set has been brought to bear on the platen as described, the rail with the other set is rocked so as to lift the rolls ofthe second set from theplaten in order" to permit insertion of the form.

Whentlfe form has been inserted, the firstset is lifted and the second set is applied and holds the form and the audit sheet on the` platen.

In order to facilitate the aligning of the forms with respect to the matter on the audit sheet, we so design the above mentioned rail on which the second set of rolls is carried, that in the position of the rail corresponding to the insertion of the form its lower edge indicates the writing point, so that the forms are readily aligned in vertical direction, ad

justable stops being provided for aligning themlaterally. l

In order to align ,forms havingperforations, such as cards, we provide a straight edge in combination with pins-adapted to enter the perforations in Vthe forms. Any number of pins may be provided for forms of various widths. In the exam le, which will be described, three pins are 's own, one on either side, and a third in a central or intermediate position.

y Preferably the pins are secured to springs to enable them to yield when forms are extracted, or ositive means like a cam shaft may be provlded for withdrawing pins which would be in the way. v

In the drawings affixed to this specification and forming party thereof a device'emthe platen,

Fig. 2 is a similar view showing the other end of the: platen and its .accessories'in theposition in which the first set of rolls is applied to the platen.

Fig. 3 is a section on the line.3-3 in Fig. 1,

Fig. 4 is a section on the line 4 4 in Fig. 2,

Figs. 5-8 illustrate the mechanism for aligning perforated forms as referred to above,

Fig. 5 being a cross section of the platen shlvingl the sets of rolls inthe same position as 1g.

Fig. 6 being an elevation of the straightedge supporting the pins viewed from the left in Fig. 5, and f Figs. 7 and 8 being sections on the lines Y 7-7 nd 8-8 in Fig. 6, respectively, drawn to a larger scale. i

Referring now to the drawings and first to Figs. 1 to 4, 10, l0 are the. sides of the platen carriage which are connected at the rear by a stay 8, l is the platen, 1 and 1 are the usualy knurled handles for rotating the platen, 2 is the usual lower paper. guide `with the rocking feed rolls 3 and 4, 5 is the usual paper guide bar and 6, 6 are the rolls of the first set which are adapted to be displaced axially-on the guide bar for the purpose mentioned.' The guide bar is arranged to rock about the stay 8 by means of two arms 7, 7. 17, 17 are links fulcrumed on the ends of the bar 5 beyond the arms 7, 16, 16 are arms which are pivotally connected with the links 17 at 16', and 9 is a'scctioned rail which is secured to one of the arms 16 at either end and is fulcrumed in the sides 10 by trunnions 9a. The rail comprises a straight lower part 9b and a curved upper part 90. 11, 11 are curved plate vsprings which are secured to the base of the curved section 9c by rivets 11 (Fig. 1). The free ends of the springs are turned up and perforated to support trunnions at the ends of rolls l2 which constitute the second set. 13 is a bar extending in parallel tothe lower straight section of the rail 9, and 14 is a stop which is adapted to be displaced onY the bar for aligning the forms laterally. Any number of stops may be, provided.

18 are pull-back springs each of which is attached to' a pin 19 on one of the sides l0 at one end, and to a pin 20 on the rail 9 at the other end.

In operation with a form b inserted above the audit sheet a, the parts are in the position illustratedv in Fig. 3, in which the paper Y guide rod 5 with the first set of rolls 6 is in its upper final position and the second set of rolls, 12, exerts pressure n the form and the audit sheet. The springs 18 are under tension andholdthe rolls 12 firmly applied onto the form and the sheet while the rolls 12 arei applied to the form b under resilient pressure by their own plate springs 11.

When it is desired to'insert a form as shown in Fig. 4,1the paper 'giiide 'rod 5 is depressed so as to bring the first setof rolls 6 to bear on the audit sheet'a and ito hold it on the platen notwithstanding its being released by the guide 2 and the feed rolls 3,

4. Simultaneously with the depression of the rod 5 and through the medium of the links and arms 16, 17, the rail 9 is rockedyabout its trunnions 9a, so that the rolls 12 of the second set are lifted from the platen 1 and the lower edge of the straight rail section 9b is moved so as to indicate the proper position of the form b in vertical direction. In lateral direction the form is aligned by the stop or stops 14. In this position the springs 18 are also under tension and hold the bar 5 with the rolls 6, 6 firmly to the platen 1. The inner face of the straight section 9b serves as a guide for the form b while it is being inserted.

Referring now to Figs. 5 to 8, 32, 32 are.

edge 31 by rivets 36 are three U-shaped springs 35, 35 and 35, one at'each end and the third in a central position, but any other number of springs may be provided, if desired. Each spring i-s provided with a pin 37, 37 and 37 respectively, which pins are adapted to project from the front face of the straight-edge 31 through perforations in the straight-edge so as to enter the corresponding perforations in the forms. The springs which tend to withdraw the pins from the perforations 'are under the control of a cam shaft 39 with a handle 40 at one end which is carried to rotate `in the brackets 32, and is also adapted to be displaced axially in such bearings for al purpose which will presently be described.

The cam shaft 39is provided with notches 38 in line with each spring. When the shaft is in such position that its solid portion en-` controlledl in unison by the notches 38 butV when forms are inserted which extend throughout the width of the straight-edge' and have no perforations for the central or intermediate pin 37 it is desirable that this pin should not protrude.- In such cases the cam shaft 39 is displaced axially so as to place the notch 41 opposite the central spring 35. As will appear` from. Fig. 6 the notches 38 are wider than the notch 41 so that they will remain in operative position with respect y to their springs notwithstandingth axial displacement of the cam shaft 39. When the shaft, 39 Ais now rotated anti-clockwise as viewed in Figs. 7 and 8, the notch 41 will 'prevent operation of the central spring 35.

while the outer spring 35 and 35 are operated as usually. On the other hand, with the cam shaft not displaced, all the springs are operated, i. e. alternately moved forward and released by the solid sections of the shaft and the notches 38.

We wish it to be understood that we do not desire to be limited to the exact details of construction shown and described for obvious modification will occur to a person skilled in the art.

In the claims affixed to this specification no selection of any particular modification of the invention is intended to the exclusion of other modifications thereof and the right to subsequently make claim to any modification not covered by these claims is expressly reserved.

We claim l. A bookkeeping machine Acomprising a carriage, a platen in said carriage, a pair of rocking arms fulcrumed on said carriage, a paper-guide bar secured to the free ends of said arms` a first set of rolls on said bar, a rail fitted to rock about a pair of trunnions in said carriage, a second set of rolls on said rail, and means connecting said' paper-guide bar and said rail so as lto alternately apply said first and second sets of rolls to said platen as said arms are rocked.

2. A bookkeeping machine comprising a carriage, a platen in said carriage, a pair of 4rocking arms fulcrumed on said carriage, a.,l

paper-guide bar secured to the free ends of said arms, a first set of rolls on said bar, a rail fitted to rock about a pair of trunnions infsaid carriage, a second set of roll-s on said rail, means including a toggle-lever mechanism and connecting said paper-guide bar and said rail so as to alternately apply said first and secondsets of rolls to said platen as said arms are rocked.

3. A bookkeeping machine comprising a carriage, a platen in said carriage, a pair of rocking arms fulcrumed on said carriage, a paper-guide bar secured to the free ends of said arms, a first set of rolls on said bar, a rail fitted to rock about a pair of trunnions in said carriage, plate springs on said rail, a second set of rolls mounted to rotate in the free ends of said plate springs, and means rocking arms fulcrumed on said carriage,-a.f

connecting said paper-'guide bar and saidrail y so as to alternately apply said first and lsecond sets of rolls to said platen as said/arms are rocked. v

4. A bookkeeeping machine comprising `a carriage, a platen in said carriage, a`pair of paper-guide bar secured to the free' ends of said arms, a first set of rolls o`n said bar, a rail fitted to rock about a pair o trunnions in said carriage, resilient means sl .p arranged with respect to said trnnnions as to oppose the turning of said rail about its trunnions in any position of said rail, .a second set of' rolls on said rail, and means connecting -said paper-guide bar' and said rail so as to alternately apply said first and second sets of rolls to said platen as said arms are rocked.

5. A bookkeeping machine comprising a carriage, a platen in said carriage, a pair of rocking arms fulcrumed on said carriage, a paper-guide bar secured to the free ends of said arms, a first set of rolls on said bar, a rail fitted 'to' rock about a pair of trunnions in said carriage, a second set of roll-s on said rail, and means connectlng said paper-guide bar and said rail so as to alternately apply said first and second sets of rolls to said platen as said arms are rocked, said rail being so designed as to serve as a paper-guide in the positionrin which the rolls of its set .are removed fom said platen.

6. A bookkeeping machine comprising a carriage, a platen in said carriage, a pair of rocking arms fulcrumed on ysaid carriage, a paper-guide bar secured to the free ends of said arms, a. first set of rolls on said bar,a rail fitted to rock about a pair of trunnions in said carriage, adjustable indicators on said rail, a second set of rolls on said rail, and means connecting said paper-guide bar and said rail soas to alternately apply said first and second sets of rolls to said platen as said arms are rocked.

7 A bookkeeping Amachine comprising a platen, two sets of rolls adapted to engage said platen, mea-ns for alternately applying one and the other set onto said platen, a support connected with said means, and means on vsaid support for engaging perforations in the forms inserted in said machine.

8. A bookkeeping machine comprising a platen, two sets of rolls adapted to engage said platen, means for alternately applying one and the other set onto said platen, a supsaid platen, means-for alternately applying one and the other set onto said platen, a support connected with said means, pins on said supportl adapted to engage perforations in the forms inserted in said machine, and means for selectively advancing and retracting said pins.

i' 10. A bookkeeping machine comprising a gaten, two sets of rolls adapted to engage idlplaten, means for alternately applying one and the other set onto said platen, a

support connected with said means, means on.

said support for engaging perforations in the form inserted in said machine, and a cam shaft for controlling said engaging means.

11. A bookkeeping machine comprising a platen, two sets of rolls adapted to engage said platen, means for alternately applying one and the other set onto said platen, a support connected with said means, means on said support for engaging. perforations in the form inserted in said machine, and a cam shaft having various cam faces adapted to control said engaging means, said cam shaft being adapted to be displaced axially with respect to said engaging means.

12. A bookkeeping machine comprising a platen, two sets of rolls adapted to engage said platen, means for alternately applying one and the other setonto said platen, a support connected'with said means, springs on said support, a pin on each spring adapted to move in a perforation in said support, a

cam shaft adapted'to control said springs so and to be displaced axially with respect to said support, and cam 'faces on said shaft adapted to cooperate seleetively with said springs upon displacement of said cam shaft.

In testimony whereof We alix our signatui-es.

RICHARD BAUMGARTEN. VILLY HESSELMANN. 

